Retinispora 



268 ) 



Rheum 



semi-matured shoots, in sand, on a hotbed. Soil, 

 fibrous loam and peat in equal parts, with sand. 



Principal Species : 



secundiflorum, 4', Jy., St., wh., in clusters. 



RETINISPORA (syn. RETINOSPORA). 



The Ketinisporas belong to the genus Cupressus, 

 which sec. They have long been favourites in 

 gardens for their elegant habit, however, and the 

 name Retinispora will not soon be lost sight of. 

 The plants are of slower growth than the majority 

 of Conifers, and thus come in very usefully for 

 the trimly kept grounds near the dwelling house. 

 They are also great favourites for cemetery adorn- 

 ment ; in fact, there are no subjects better suited 

 for this class of work. When growing in sheltered 

 positions they remain feathered to the base until 

 the last. Propagation, as for the Cypresses 

 generally, is by seeds, and by cuttings in October. 

 The latter root freely. Descriptions of species 

 will be found under CUPBESSUS. 



RHAMNUS. (BUCKTHORN.) 



Description. Few of the sixty species (prd. 

 Rhamnese) are of great decorative value. Frangula 

 and catharticus have been planted to a consider- 

 able extent at various times for cover for game, 

 and even now they are frequently included in 

 shrubberies for the sake of their shining black 

 berries. In the autumn libanoticus is conspicuous 

 by reason of its richly hued foliage. Several dyes 

 are afforded, and some fruits have purgative 

 qualities. The wood of Frangula is employed in 

 the manufacture of gunpowder. 



Propagation. All the hardy species by seeds 

 and layers ; the stove and greenhouse forms, by 

 cuttings. 



Soil. Any fairly fertile garden soil will do. 



Principal Species and Varieties : 

 Alaternus, 'JO', Ap., Je., orius and Wicklius of 



hdy., grn. gardens). 



angustifolius, narrower davuricus, l.V to 20', My.. 

 Ivs. (s'fH*. angustifoliu, hdy., grn., yel., brandies 

 Clusii, and utilis of spiny (xynit. bapticus, 

 gardens, not Decaisne). utilis, and virgatus). 



angustifolius variegat- Hirsutus is a var. 



us, Ivs. margined silvery Frangula, .V to 10', sum., 



\vh. hdy., grn., wh., fruits 



aureus, Ivs. dotted yel. blk. (xt/n. latifolius of 

 californicus,6' to 12', My.. gardens, not L'Heri- 



hdy. ev., grn. (syiix. in- tier'. Asplenifolius, an- 



termedius, laurifolius, giistifolius, and aureo- 



oleifolius, pedunculatus, variegatus are vars. 



and Frangula califor- Berry -bearing Alder, 



nica). Black Dogwood. 



cafharticu8,5' to 10', sum., libiuoticus, 6', My., hdy., 



hdy., grn., fruits blk. ; yel. (/,*. eastiinrit'nlia 



Britain (XIIHH. infect- grandifolia and Imeri- 



tiie of gardens). 

 Other Species and Hybrids : 



amifolius, '2' to 4', sum., a supposed hybrid (Ala- 



hdy., gru., fruits blk. ternus X nlpinus ; KI/HI 



(nyii. franguloides). sempervireus and sub- 



alpinus, 4', sum., hdy., sempcrvirens of gar- 



grn., fruits blk. Grandi- dens), 



folius is a var. purshianus.10' to 20', My., 



croceus, 4', My., hdy. ev., hdy., grn., fruits lilk., 



grn., fruits gni. or yel. relatively large (xyn*. 



hybridus, sterile, Ivs. per- rubra and Fraugula 



sistent till second win., pursliiona). 



RHAPHIDOPHORA. 



(.'limbing stove shrubs (prd. Aroidese), with long 

 branches which root as they touch the ground. 



They may be allowed to ramble over a dead tree 

 stem or to fasten themselves against a wall, and 

 have a decidedly elegant appearance. Propagation, 

 by seeds, and by cuttings in sandy peat and loam 

 under a bell-glass, with bottom heat. Soil, fibrous 

 loam and sandy peat, with a few pieces of char- 

 coal. 



Principal Species ; 



[NOTE. s. = spathe, sp. = spadix.j 

 decursiva, s. yel., sp. grey- Peepla, s. yel. , reddish 



ish grn., long and thick. yel., sp. yel. 



laneifolia, Ivs. lance pertusa, Ivs. heart shaped. 



shaped, 10" long. s. pinuata (now Epiprem- 



Apricot, spotted grn., num mirabile). 



sp. wh. 



RHAPHITHAMNUS. 



Greenhouse trees (urd. Verbenacere). Cyano- 

 carpus, 3' to 20', blue, lilac berries, is hardy in the 

 south of England. Propagation, by cuttings. Soil, 

 light loam. 



RHAPIS. 



Distinct-looking Palms (ord. Palmse), with leafy, 

 Reed-like stems and fan shaped leaves. Several 

 take kindly to cool house culture. Flabellifonnis 

 is good for use in draughty corridors. The varie- 

 gated form is more effective, and also more tender. 

 Propagation, by imported seeds, and suckers. Soil, 

 tiood loam three parts, leaf mould one part, and 

 sand. (See also PALMS.) 



Principal Species and Variety : 

 flabellit'ormis, 3' to 8 , five foliis variegatis. Ivs, 



to seven spiny leaflets striped wh. 



(syn*. aspera and Kwau- himiilis, dwarfer (H.HH 



wortsik). Ground Eat- Sirotsik o; gardens). 



tan Caue. 



Other Species : 



cochinchinensis, stem 8', Ivs. fan shaped, petioles 



prickly 



RHAZYA. 



Two species of hardy shrubs or sub-shrubs {ord. 

 Apocynacese), allied to the Vincas. Propagation, 

 by seeds and division. Soil, sandy loam. 



Principal Species : 



orientalis, sum bl., vio. 'vs. lance shaped, 



RHEEDIA. 



An obscure genus (prd. Guttifera;) of stove trees, 

 with small flowers and leathery leaves, of no deco- 

 rative value. 



RHEUM. (RHUBARB.) 



Description. Apart from the common Rhubarbs, 

 ; forms of Rhaponticum and undulatum, there are 

 several other Rheums (ord. Polygonaceae) serviceable 

 on account of their products. Thus, the Rhubarb 

 or Turkey Rhubarb of medicine is obtained from 

 palmatum, offlcinale, and Rhaponticum. Rheums 

 may be also made of service in the garden or 

 grounds, where the massive and ornamental leaves 

 and tall spikes of bloom might be more largely 

 employed. 



Propagation. By seeds, sown in spring, or by 

 division in spring or in autumn. 



]llnij>lii<ln]>Ji i/llum (nee Rjia 

 Itlnipli'ioditn (sec JI;/pfix). 

 Rhaphiolepit (sec Raphiolepis). 

 Itluipli'xlmtpora (see Jugtima). 

 ll/iapvnticiim (we I'rntaurca). 



